Description: A型星是指光谱类型为“A“的恒星。天文学家通过A型星光谱中存在的非常强的氢吸收线来识别它们。它们的典型（有效）温度在7400 K到10,000 K之间。与其他恒星相比，除非受到星际或大气层红化的影响，否则它们在人眼中呈现白色或蓝白色。天狼星是夜空中最亮的恒星，而织女星是所有其他恒星在视星等尺度上衡量其他星亮度的标准星，它们都是A型星。

Related Terms:

• 视星等
• 天狼星
• 光谱类型
• 恒星
• 红化
• 有效温度
• 吸收线

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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